66117930658634 has 24 divisors (see below), whose sum is σ = 101944141444908. Its totient is φ = 32160953306880.

The previous prime is 66117930658589. The next prime is 66117930658657. The reversal of 66117930658634 is 43685603971166.

It can be written as a sum of positive squares in 6 ways, for example, as 26830069050625 + 39287861608009 = 5179775^2 + 6268003^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17801732 + ... + 21192864.

Almost surely, 2^{66117930658634} is an apocalyptic number.

66117930658634 is a deficient number, since it is larger than the sum of its proper divisors (35826210786274).

66117930658634 is a wasteful number, since it uses less digits than its factorization.

66117930658634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398330 (or 3398293 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 65.

The spelling of 66117930658634 in words is "sixty-six trillion, one hundred seventeen billion, nine hundred thirty million, six hundred fifty-eight thousand, six hundred thirty-four".